Lubrication system



Oct. 17, 1933. w 3 OCHRANE 1,931,060

LUBRICATION SYSTEM Filed March 5, 1928 W A 7701m5 Y Patented ct. 17,1933

MIUNIT-D 4STA LBRIC'ON SYSTEM Wa.1ter S. C0ohraiie, Dettoit, Mich., assignort0 Chrysler Corporation, Detroit; Mich., a oorporation of Delaware Application March 5, 1928. Sefiai No) 259,196

5 Claims,' (Cl. is46) invention relates toiubrication systems for internal combustion engines of thetypeused in automotive vehicles and consists*in asystem for supplying lubricant to the Cylinder walls of the enginduringits warmihg-up period.

Heretofore Iubrication systems have been pro- Vided in which manually controlied means has been providedtocontrol the flow of lubricant 150 v the cylinder walls and auxiliary systems have been provided for supplying lubricant to the cyl- It is therefore an object of this inder walls. invention to proVide automatic means for supplying lubricant to the cylinder wall which applies a predetermined amount of lubricant 'during its' warming-up period and is automaticail shut off 1 piston 32 is provided with the usual 'packing 38w after theengine has runfor a short timeL Another object of the invention is to embodythe automatic ineahs in the lubricating system. As an example of a particular embodiment of 2o'my inventionl have shown a means such as a rciprocating piston adapted to force a predetermined .amount of lubricant to thec'yiinder walls; operated bythe lubricant pressure from the pump.

Other objects and advantages will -more tully appear from the folloWingdescription taken in connection with the accompanying 'drawing, in wmch;.: 7

Fig. 1 isa side viewof an internal combustion engine, parts being broken away and in section showing an application of my invntionb' Fig. 2 is a sectional viwthr0ugh the Iubricant supplying means.

Fig. 3 is a modification sh0wig another form of niy-"device; -parts bein'g broken away and in" to the cylinder flwa11s;-

section u Fig. 4 is a 'sectional view=takn on line 44 01? Fig. 1.

Referring particularly to Fig] of the draving,

I have shown an internal combustion engine 10 provided With a crankshaft 12, camshaft 14 and cylinders 16. An 01] pan has been shown asat 18 adapted to receive a quantity of lubricant anda pump 20 is adapted to deliver lubricant to the various parts of the engine, for example, the bear- "ings of the crankshaft 12 and cam shaft 14.

The pump 20 is of usual design and is provided with a branched outlet having passages 22 and 24.

The passage 24 is adaptedto deliver lubflcant to the various bearings of the engine.

It will be understood that after the engine has been standing, particularly in cold weather, the

lubricant is viscous and the bearings are (301d. The engine must be xun for some time before the bearings become warm enough to pernfltthe lubricant to go through the bearings to be thrown on the cylinder wail's. Due to vis-1 cosity of the lubricant the:cylinder wallsrn:dry during the warming uppriod of the engine. As a means of avoiding this objetionable, f eatur 6 I have provided a chamber 30 adapted td receWe a predetermined amountof iubricant throughhe passage 22 which delivers lubricant-Mnder prswith theoil pump 20 and is provided with aboss L L 34 adapted to receive the passage 22 ieadinginto the chamber 30 atone side ofthepiston 32. The

and has amember 40 extending aXial1y'through the pistn=and beyond its oppositesides. :The: member 40 has anopening '42 throflgh 'which lubricant may -pass Irom:one side of thepiston to the other. 7 A screw-threaded p1ug 44 closes on end of the chamber 30 and'limits the movement of the piston 32 in ohe .direction bythe engagenient of "one end of the'member40 againstthe: plug 44 thus pr0viding a comprtment4 to which" the lubricant is supplied, Between the= opposite end of the-chanlber 30 and the opposite side "of the piston 32 a Sp'ring-4B normally holds the piston in the position 'shown on thdra tvingL When thejengine is started the pnn ip20 forcesthe lubricaht thro'gh the passage 22 irito the ccimpartment' '46 where thepressure' causes the piston to move to the left, disblatigth lubrioant in the cOmpartnient 50 through aconrie0tion- 52 When 'the end of the member 40 engages the end 54ofthe chamber 3 0, the Iubricant ceaseS t o flo w through the cnnection'52ffid the piston reinins in that positins long asthere is anypressure onth opposite side of the piston, or during the running of theengine. When theengine s stopped, the pressure in the compartment 46 is relieved and the spring 48'returns.the piston 32 to its normal position, the charhber 50 being refilled through the passage 42. If desired, a washer 56 may be proVided to seal the end 'of the member 40 to further prevent lubricant from passing through the opening 42 hen the piston 32 is in its position at the extrame left. v It will be understood that the pump acts as a sufiicient check to prevent the lubricant 165 7 from returning through the passage 22 while the piston 32 is being returned.

municates with*a header 58 connected to each A 'The opposite end of the connection 52 comvalve away from its.sat.

the passage 70 is adapted to fiow through opens ing 74 and passage 76 to the header 58. Another passage 78 formsa communication between the passage 68 and chamber 66. A piston 80 is adapt ed for reciprocation within the chamber 66 and a spring 82 normally holds the piston in a position as shown in the drawing. At the left of the chamber 66, I have provided a bushing 84 adapted to receivea valve 86 in axial alignment with the passage 74." The valve 86 .has a.stem 88 projecting into the chamber 66. A spring 90 between the bushing 84 and a collar 92 normally holds the As the lubricant is, delivered throu8hthe passage 72 a portion thereof goes into,the header 58 through passages 70 and 74 and .76 and another,portion thereof goes through the passages 68 and 78 at one side of the piston 80. The. pressure of this forced lubricant causes the piston 80 to move to theleft, displacing any lubricant or air on the opposite side of thepiston through a vent 94. As the piston engages the end of the stem,88the valve 86 closes,

the passage 74shutting off the sppiy of lubricant to the header 58 and the piston 80 remains in this position as long as the lubricant pressure is maintained, or the engine running. When the engine is stopped the spring 82 returns the piston 80 to the.position shown on the dravving and =the valve '86 is automaticall opened for a s11pply of lubricant to be delivered to the header when the. engine is again started.

It will be understood that I have provided a construction in whichiubr icant is supplied to the -cylinder walls during. the warming up period by a means operable by the oil pressure.

1VVhile I have shown the preferred embodiment of my invention it is to be understood that va:- rious changes in;thesize'and arrangemeno of parts may be made without departing frdm the spirit of m invention. The piston may be replacedby other means such as a diaphragm for displacing the lubricant on one side by pressure on the opposite;side. It is not my intention tu limit the scope of my invention other than by the terms of the appended claims. 7

What I claim is:

1. In an internal combustion engine, the combination with an 0i1 pan; anoil system including a pump in the lower portion of said oil pan, means for conducting lubricant to the parts of the engine to be Iubricated, means for conducting lubricant to the cylinder walls of said engine, and means in said oi1 pan adjacent said pump for reguiating the amountof lubricant conducted to said cylinder walls by the fluid pressure from said pump.

2. A device of the class described comprising ahousing, a plurality of passages in said housing adapted to receive fiuid pressure, a chamber within said housing, a communication between one of said passages and said chamber, a connectiori from another of.Said passages to a part to receive the i iuid pressure, and valve means for shutting off the flow through said last named passage by the pressure in said first named p s v -3. A device of the class described comprising a housing, a chamber Within said housing, a passage adapted to deliver a fluid pressure, a pair of passages coxhmunicating with said. passage and adapted to receive the fluid pressure,a com munication between one of said. passages and said chamber at one end thereof,a valve at the opposite end of said chamber for closing theothr of said passages, a reCiprocating :memberWithiri; said chamber between said valve and said com-.

munication, a spring for urging said valve in its open position, and a spring for urging said piston away from said valve.

4, A device of the class described comprising ai1ousing, a chamber within said housing, 3

passage adapted to deliver a fiuid pressure,.a pair of passages communicating with saidpas sage and adapted to receive theflfiuid pressure, acommunicationbetween one of said passages and said chamber at one end thereof; a valve at the opposite end of said, chamber for closing the other of saidpassages, a.reciprocatingmm.

ber within said chamber between said valve and said communication, a spring for urging said valve in its open position, and a springior .urging said piston away from said valve.

5. In a lubricg ting system for interna1 combustion engines and the like, the combination with a cylinder, of a source of lubricant under pressure; of.a pump, an auxiliary pump provided with a chamber having an inlet passage arranged in constant communication with the source 01.,

lubricant under pressure during operation of said first mentioned'pump and having an outlet passage establishing communication with the interior of the said cylinder, anda piston recip o+ cably mounted in said chambrand operable by; the lubricant under pressure for forcing lubricant through the 'outlet passage af0resaid upon the walls of said cylinder. WALTER S. COCHRANE. 

